op {
  graph_op_name: "TPUOrdinalSelector"
  visibility: HIDDEN
  out_arg {
    name: "device_ordinals"
    description: <<END
A vector 1 or more TPU cores.
END
  }
  summary: "A TPU core selector Op."
  description: <<END
This Op produces a set of TPU cores (for warm-up) or a single TPU core
(for regular inference) to execute the TPU program on. The output is
consumed by TPUPartitionedCall.
END
}
